code: def _post_process_stream(stream: Optional[bytes]) -> str:
      if stream is None:
          return ""
      decoded_stream = stream.decode()
      if len(decoded_stream) != 0 and decoded_stream[-1] == "\n":
          decoded_stream = decoded_stream[:-1]
      return decoded_stream
  
imports: import json
  import logging
  import os
  import subprocess
  from typing import Any, Dict, List, Optional, Tuple, Union
  import requests
  from dockerpycreds.utils import find_executable
  from wandb.docker import auth, www_authenticate
  from wandb.errors import Error
label_desc: Use image node_id 8 for calling a global function with example usage: _post_process_stream(stream) and returns: decoded_stream, str